—I wonder what makes you a great teacher?—I _______ as a tutor in my spare time at college, which contributes much to my today’s job.
—Did you find the missing couple in the mountain yesterday? —No, but we ________ to get in touch with them ever since.
—Such a mistake could have been avoided. —Unfortunately, he _______ the mistake again and again.
—May I remind you that a Mr. Wang is waiting outside, sir? —Oh, that’s right. I __________ about it.
—Did you enjoy your holiday? —Yes, it’s the best holiday I ___________ these years.
Just look at the room. My roommate ____ up his clothes.